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Papaya Ring Spot Virus:An Understanding of a Severe Positive-Sense Single Stranded RNA Viral Disease and Its Management

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Phyton-International Journal of Experimental Botany 2022年第10期91卷 2099-2110页

作者： Muhammad Umer Mustansar Mubeen Yasir iftikhar Haider ali Muhammad Zafar-ul-Hye Rafia Asghar Mazhar Abbas Malik Abdul Rehman Ernesto A.Moya-Elizondo Yuejun He Institute for Forest Resources and Environment of Guizhou and Forestry College Research Centre of Forest EcologyGuizhou UniversityGuiyang550025China Department of Plant Pathology College of AgricultureUniversity of SargodhaSargodha40100Pakistan College of Bioscience University of BirminghamBirminghamB152TTUK Department of Soil Science Faculty of Agricultural Sciences and TechnologyBahauddin Zakariya UniversityMultan60800Pakistan Department of Plant Pathology PMAS University of Arid AgricultureRawalpindi43490Pakistan Department of Agriculture and Agribusiness Management University of Karachi Karachi75270Pakistan Citrus Research Institute Sargodha40100Pakistan Department of Plant Production Faculty of AgronomyUniversidad de ConcepciónChillán3780000Chile

Viral diseases have been studied in-depth for reducing quality,yield,health and longevity of the fruit,to highlight the economic ***-sense single-stranded RNA viruses are more devastating among all viruses that infect fruit *** of the best examples is papaya ringspot virus(PRSV).It belongs to the genus Potyvirus and it is limited to cause diseases on the family Chenopodiaceae,Cucurbitaceae and *** virus has a serious threat to the production of papaya,which is famous for its high nutritional and pharmaceutical *** plant parts such as leaves,latex,seeds,fruits,bark,peel and roots may contain the biological compound that can be isolated and used in pharmaceutical industries as a disease *** disease symptoms consist of vein clearing and yellowing of young *** ring spot patterns with concentric rings and spots on fruit reduce its quality and *** virus has two major strains P and *** former cause disease in papaya and cucurbits while the later one in *** comprises 94.4%protein,including a 36 kDa coat protein which is a component responsible for a non-persistent transmission through aphids,and 5.5%nucleic *** protection,development of transgenic crops,exploring the resistant sources and induction of pathogen derived resistance have been recorded as effective management of *** with these practices reduced aphid population through insecticides and plant extracts have been found ecofriendly approaches to minimize the disease *** of transgenic crops is a big challenge for the success of disease resistant papaya *** aim of this review is to understand the genomic nature of PRSV,detection methods and the different advanced control meth*** review article will be helpful in developing the best management strategies for controlling PRSV.

关键词： Papaya obligate parasite +ssRNA PRSV aphid genomic characterization and functions

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Real Estate Management via a Decentralized Blockchain Platform

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Computers, Materials & Continua 2021年第2期66卷 1813-1822页

作者： iftikhar Ahmad Mohammed AAlqarni Abdulwahab ali Almazroi Laiba Alam Department of Computer Science and Information Technology University of Engineering and TechnologyPeshawarPakistan Department of Software Engineering College of Computer Science and EngineeringUniversity of JeddahJeddahSaudi Arabia Department of Information Technology College of Computing and Information Technology at KhulaisUniversity of JeddahJeddahSaudi Arabia

Blockchain technology is one of the key technological breakthroughs of the last *** has the ability to revolutionize numerous aspects of society,including financial systems,healthcare,e-government and many *** such area that is able to reap the benefits of blockchain technology is the real estate *** many other industries,real estate faces major administrative problems such as high transaction fees,a lack of transparency,fraud and the effects of a middleman including undue influence and *** enables supporting technologies to overcome the obstacles inherent within the real estate investment *** technologies include smart contracts,immutable record management and time-stamped *** utilize these key properties of blockchain technology in our work by proposing a system that has the ability to record real estate transactions in a private blockchain,using smart *** immutability of the blockchain ledger and transactions can provide a safe space for the real estate *** technology can also assist the authentication process by hastening background *** digital keys are provided to parties that are involved in a contract,thus minimizing the risk of *** also discuss the rationale behind the advantages of using a blockchain in this manner,and how we selected the consensus mechanism for our proposed system.

关键词： Blockchain real estate smart contracts

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Challenges of modern day transition care in inflammatory bowel disease: From inflammatory bowel disease to biosimilars

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World Journal of Gastroenterology 2017年第25期23卷 4473-4479页

作者： ali Hakizimana iftikhar Ahmed Rachel Russell Mark Wright Nadeem A Afzal Department of Paediatrics University Hospital Southampton Department of Gastroenterology University Hospital Southampton Department of Hepatology University Hospital Southampton

In this article we discuss the challenges of delivering a high quality Transition care. A good understanding of the adolescent needs with good communication between Transition care physicians and the patient is essential for good continuity of care. Despite availability of several guidelines, one model doesn't fit all and any transition service development should be determined by the local need and available healthcare facilities.

关键词：转变青春期煽动性的肠疾病 Biosimilar

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PAIgG and PAIgM levels in secondary dengue virus infections lead to thrombocytopenia in patients from KP, Pakistan

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Asian Pacific Journal of Tropical Biomedicine 2015年第10期5卷 801-805页

作者： Ibrar Alam Said Hassan iftikhar Alam Rahmat Gul Farhad aliIjaz ali Sana Ullah Imtiaz ali khan Aasif Awan Department of Biotechnology Bacha Khan University Charsadda Institute of Biotechnology and Genetic Engineering(IBGE) The University of Agriculture Center of Biotechnology and Microbiology University of Peshawar Department of Human Nutrition and Dietetics Bacha Khan University Charsadda Department of Zoology University of Peshawar Department of Entomology The University of Agriculture

Objective: To understand the impact of platelet associated immunoglobulin G(PAIg G)/platelet associated immunoglobulin M(PAIg M) on severity of dengue virus infection leading to ***: In this study we examined a total of 52 patients who were having secondary infection of dengue in acute phase by using competitive ***: A decrease in the platelet count was observed at the acute phase of infection while all along the recovery stage the count of platelet was significantly increased. A significant decrease was observed in PAIg G and PAIg M in these subjects. Inverse correlation was found between platelets count and PAIg G/PAIg M among the subjects studied. In the platelets elution from ten subjects, anti-dengue virus immunoglobulin G and immunoglobulin M were observed. PAIg G and PAIg M with inclined levels were higher in dengue hemorrhagic fever than the classical dengue fever. In the development of dengue hemorrhagic fever PAIg M inclined level was independently associated with high specificity, showing a possible indication of dengue hemorrhagic ***: This study suggests that in secondary dengue virus infection, the PAIg G and PAIg M levels, and the activity of anti-dengue virus play key roles, both in the development and severity of the disease.

关键词： dengue Pakistan immunoglobulin hemorrhagic severit

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Satellite remote sensing of grasslands:from observation to management

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Journal of Plant Ecology 2016年第6期9卷 649-671页

作者： iftikhar ali Fiona Cawkwell Edward Dwyer Brian Barrett Stuart Green Department of Geography University College CorkCorkIreland Spatial Analysis Unit TeagascDublinIreland EurOcean-European Centre for Information on Marine Science and Technology LisbonPortugal School of Geographical and Earth Sciences University of GlasgowGlasgowUK

Aims Grasslands are the world’s most extensive terrestrial ecosystem,and are a major feed source for *** increasing demand for meat and other dairy products in a sustainable manner is a big *** a field scale,Global Positioning System and ground-based sensor technologies provide promising tools for grassland and herd management with high *** the growth in availability of spaceborne remote sensing data,it is therefore important to revisit the relevant methods and applications that can exploit this *** this article,we have reviewed the(i)current status of grassland monitoring/observation methods and applications based on satellite remote sensing data,(ii)the technological and methodological developments to retrieve different grassland biophysical parameters and management characteristics(***,grazing intensity)and(iii)identified the key remaining challenges and some new upcoming trends for future *** Findings The retrieval of grassland biophysical parameters have evolved in recent years from classical regression analysis to more complex,efficient and robust modeling approaches,driven by satellite data,and are likely to continue to be the most robust method for deriving grassland information,however these require more high quality calibration and validation *** found that the hypertemporal satellite data are widely used for time series generation,and particularly to overcome cloud contamination issues,but the current low spatial resolution of these instruments precludes their use for field-scale application in many *** trend may change with the current rise in launch of satellite constellations,such as RapidEye,Sentinel-2 and even the microsatellites such as those operated by Skybox *** imagery has not been widely used for grassland applications,and a better understanding of the backscatter behaviour from different phenological stages is needed for more reliable products i

关键词： remote sensing agricultural grassland grassland biomass pasture management grazing intensity

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Biosynthesis of polyhydroxyalkanoates from styrene by Enterobacter spp. isolated from polluted environment

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Frontiers in Biology 2017年第3期12卷 210-218页

作者： Arooj Arshad Bisma Ashraf iftikhar ali Nazia Jamil Department of Microbiology and Molecular Genetics University of the Punjab Quaid-e-Azam Campus Lahore-54590 Pakistan

BACKGROUND： Styrene and its metabolites are known to have serious adverse effects on human health and hence, strategies to prevent its release, eradicate it from the environment, and understand its route of degradation are being considered. METHODS： A total of 18 strains were isolated from 4 samples of diesel contaminated soils. Among them 5 strains were selected for their ability to degrade styrene and use it as a sole carbon source to produce PHA. These strains were identified as Enterobacter spp. on the basis of 16S rRNA gene sequencing. Bacteria were screened for their ability to produce PHA by utilizing glucose and styrene as a carbon sources. Screening for PHA production was done by Nile blue A, Sudan black B, and phase contrast microscopy and the selected 3 strains showed positive results. Growth kinetics along with time profiling of PHA was performed for glucose and styrene as carbon sources. RESULTS： PHA extraction was done at equal intervals of 12 h by sodium hypochlorite method which showed that these strains accumulate maximum amount of PHA after 48 h in glucose （30.60%）. FTIR analysis of PHA was done which revealed homopolymer PHB and copolymer （PHB-co-PHV） production in strains by utilizing glucose and styrene. Gas chromatography mass spectrometry was carried out to identify the metabolites produced by bacterial strains grown on styrene. Metabolites of styrene degradation included propyne and phenylalanine. Genomic DNA isolation was carried out to amplify phaC gene which encodes PHA synthase enzyme. CONCLUSIONS： The conversion of styrene to polyhydroxyalkanoates （PHA） provides a new and unique link between an aromatic environmental pollutant and aliphatic PHA accumulation.

关键词： biodegradable polymers environmental pollutants PHA FTIR recycling bacteria

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Infield superconducting properties of nano-sized Ag added Cu0.5Tl0.5Ba2Ca2Cu3O10-δ

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Progress in Natural Science:Materials International 2017年第4期27卷 487-490页

作者： M.W.Rabbani Liaqat ali M.Mumtaz iftikhar Hussain Gul Materials Research Laboratory Department of Physics FBAS International Islamic University(IIU) Department of Material s Engineering(ME) Thermal Transport Laboratory(TTL)School of Chemical and Materials Engineering(SCME)National University of Science and Technology(NUST)

Infield superconducting properties of {(Ag)/CUTl-1223};(x = 0, 0.5,1.***.2.0 and 4.0 wt %) nanoparticlessuperconductor composites were investigated under different applied magnetic field up to H = 8 T. The increase in critical temperature {T(0)} and decrease in normal state resistivity(p) were observed with increasing contents of Ag nanoparticles in CuTl-1223 superconducting matrix. The value of T(K) remained almost unaffected by applying external magnetic field, but a decreasing trend in T(0) was observed by increasing the value of external applied magnetic field. The transition region below T(K) showed Arrhenius behavior due to thermally activated flow of magnetic vortices. Enhancement in flux flow activation energy(U) and suppression in transition width(ΔT) of CuTl-1223 phase with addition of Ag nanoparticles showed the improvement in flux pinning strength of superconductor.

关键词： Ag)_x/CuTl-1223 composites Activation energy Transition width Flux pinning Critical field

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Visual object tracking- classical and contemporary approaches

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Frontiers of Computer Science 2016年第1期10卷 167-188页

作者： Ahmad ali Abdul JaliL Jianwei NIU Xiaoke ZHAO Saima RATHORE Javed AHMED Muhammad AKSAM iftikhar Department of Computer and Information Sciences Pakistan Institute of Engineering & Applied Sciences Islamabad 44000 Pakistan State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and Engineering Beihang University Beijing 100191 China Department of Electrical (Telecom) Engineering NUST Military College of Signals Islamabad 44000 Pakistan COMSATS Institute of Information Technology Lahore 54000 Pakistan

Visual object tracking （VOT） is an important sub- field of computer vision. It has widespread application do- mains, and has been considered as an important part of surveillance and security system. VOA facilitates finding the position of target in image coordinates of video frames. While doing this, VOA also faces many challenges such as noise, clutter, occlusion, rapid change in object appearances, highly maneuvered （complex） object motion, illumination changes. In recent years, VOT has made significant progress due to availability of low-cost high-quality video cameras as well as fast computational resources, and many modern techniques have been proposed to handle the challenges faced by VOT. This article introduces the readers to 1） VOT and its applica- tions in other domains, 2） different issues which arise in it, 3） various classical as well as contemporary approaches for object tracking, 4） evaluation methodologies for VOT, and 5） online resources, i.e., annotated datasets and source code available for various tracking techniques.

关键词： visual object tracking computer vision imageprocessing point tracking kernel tracking silhouette track-ing

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Elemental composition of rice using calibration free laser induced breakdown spectroscopy

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Optoelectronics Letters 2019年第1期15卷 57-63页

作者： Abdul Jabbar Mahmood Akhtar Arslan ali Shaukat Mehmood Sidra iftikhar Muhmmad Aslam Baig Department of Physics Mirpur University of Science and Technology National Centre for Physics

In this paper, we apply laser induce breakdown spectroscopy (LIBS) to determine the elemental composition of different parts(root, stem and seed) of the rice plant and determine their weighted concentration using calibration free laser induced breakdown spectroscopy (CF-LIBS) technique. Ca, Fe and K are identified as major elements, while C, Ti, Mg, Si, Li, Ba, Sr, Cr, Na and Al as minor elements. We also detect the H-alpha line of hydrogen in the spectrum and determine the electron number density. The electron number density and its behavior as a function of laser energy, laser wavelength and the detector position are investigated. The plasma temperatures of samples are determined, and the validity of the assumption of the local thermodynamic equilibrium (LTE) is discussed.

关键词： Elemental composition calibration breakdown spectroscopy

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Optoelectronic Response of GeZn_(2)O_(4) through the Modified Becke-Johnson Potential

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Chinese Physics Letters 2012年第9期29卷 142-146页

作者： iftikhar Ahmad B.Amin M.Maqbool S.Muhammad G.Murtaza S.ali N.A.Noor Department of Physics University of MalakandPakistan Materials Modeling Lab Department of PhysicsHazara University21300Pakistan Department of Physics and Astronomy Ball State UniversityIndiana47306-0505USA Department of Physics Islamia College UniversityPeshawarPakistan Department of Physics University of the PunjabQuaid-e-Azam Campus54590Pakistan

A first-principles technique capable of describing the nearly excited states of semiconductors and insulators,namely the modified Becke–Johnson(mBJ)potential approximation,is used to investigate the electronic band structure and optical properties of spinel oxides:GeZn_(2)O_(4).The predicted band gaps using the mBJ approximation are significantly more accurate than the proposed previous theoretical work using the common LDA and *** gap dependent optical parameters,like the dielectric constant,index of refraction,reflectivity and optical conductivity are calculated and *** results from the dielectric constant shows that the numerical value of the static dielectric,after dropping constantly,becomes less than zero and the material exhibits metallic *** refractive index also drops below unity for photons higher than 18 eV,which indicates that the velocities of incident photons are greater than the velocity of ***,these phenomena can be explained by the fact that a signal must be transmitted as a wave packet rather than a monochromatic *** comprehensive theoretical study of the optoelectronic properties predicts that these materials can effectively be used in optical devices.

关键词： wave. dielectric approximation

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